Moldboard.



J. S. FERRIS.

MOLDBOARD. APPLICATION FILED APR. a, 1913.

1,083,606. Patented Jan. 6, 1914,

' James :5. Ferrzls;

COLUMBIA PLANOORAPH conwAsamu'tcN. n. c.

UNITED STAT JAMES S. FERRIS, OF WAXAHAGI-IIE, TEXAS.

MOLIDBOARD.

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Specification of Letters Patent.

Patented Jan. 6, 1914:.

Application filed April 3, 1913. Serial No. 758,533.

To all whom it may concern:

Be it known that I, JAMns S. Fnnnrs, a citizen of the United States,residing at WaXahachie, in the county of Ellis and State of Texas, haveinvented certain new and useful Improvements in Moldboards, of which thefollowing is a specification.

My invention relates to mold boards for plows, and relates moreparticularly to that type of mold board which has its working facecoated with plaster of Paris to more eiiiciently shed sticky or moistsoil, such as that commonly termed black waxy land.

In the present practice, the plaster of Paris coating is held upon theworking face of the mold board by bolting or riveting certain piecesupon said face to provide a retention to said coating, and in order thatthe holes for the rivets or bolts may be bored, the temper must be drawnout of the mold board and again restored after the holes have beenbored. This process is rather expensive and moreover is apt to leave themold board in an impaired condition. This method of retaining theplaster of Paris coating upon the mold board face is furtherobjectionable for the reason that a very considerable amount of work isnecessary to remove the said pieces when it is desired to use the plowwithout the plaster of Paris coating.

It is the object of my invention to provide a device for retaining aplaster of Paris coating upon a mold board, which device may be easilyattached to or detached from the mold board, without necessitatingboring any holes in the mold board or otherwise altering the same.

A further object of my invention is to provide a device that will bestrong, durable, simple and eflicient and comparatively easy toconstruct and one which will not be likely to get out of order.

With these objects in view, my inventlon has relation to certain novelfeatures of the construction and use, an example of which is describedin the following specification, and illustrated in the accompanyingdrawing, wherein:

Figure 1 is a top view of a mold board provided with a plaster of Pariscoating retained by the novel device constituting my invention. Fig. 2is a transverse sectional view taken upon the line m-m of Fig. 1.

Referring now more particularly to the drawing, wherein like referencecharacters designate similar parts in both of the figures, the numeral 1denotes an ordinary plow mold board having its working face coated withplaster of Paris as indicated at 2. The short edge of the mold boardwhich will come adjacent to the plow point is designated by the numeral1 Upon the two opposite elongated edges of the mold board are mountedrods 8 and 4 of circular cross section, which rods conform to the curveof said mold board edges and serve to retain the plaster of Pariscoating against a displacement parallel with the mold board face. Sincethe cylindrical surfaces of said rods 3 and 4: permit a certain amountof the plaster of Paris to enter between said rods and the mold boardface, they will also to some extent retain the coating againstdisplacement outward from the mold board face. To each of said rodsthere is pivotally secured a number of hooks 5, the hooks 5 of one rodbeing extended toward those of the other and engaged with same asindicated at 5 The lengths of the hooks will preferably be such thatengagement between the two sets will be made above the center portion ofthe mold board. The rivets which establish a pivotal connection betweenthe hooks 5 and the correlated rods 3 and 4 are designated by thenumeral 6. The outer end of each hook 5 is formed with a hook 7 which isadapted to engage the correlated mold board edge as is clearly shown inFig. 2. The members 5 serve the double purpose of reinforcing andretaining the plaster of Paris coating and also retaining the members 3and a in their proper positions relative to the mold board. The members5 will preferably be spaced slightly above the mold board face in orderto better retain the plaster of Paris coating against displacement fromsaid face.

The above described device is such that it may be very quickly appliedto a mold board before the plaster of Paris is poured upon the same, andwhen it is desired to use the mold board in the ordinary manner, theplaster of Paris may be broken off and the retaining device easilyremoved.

The invention is presented as including all such modifications andchanges as properly come within the scope of the following claims.

What I claim is:

1. In a composite mold board, an imperforate plate, having a continuousface free from marginal projections, a marginal retaining deviceremovably mounted along two edges of the plate, and a coating of plasticmaterial deposited on the face of plate and confined by the marginalretaining device.

2. In a composite mold board, an imperforate plate having a continuousface free from marginal projections, a marginal retaining devicecomprising means engaging two edges of the plate and adapted to hold theretaining device on the plate, and a coating of plastic materialdeposited on the face of the plate and confined by the marginalretaining device.

3. In a composite mold board, a met-a1 plate, a pair of opposed marginalretaining members shaped to conform to opposite edges of the plate,means connected with the members for engaging the edges of the plate,connections between the said means extending over the face of the plate,and a coating of plastic material deposited on the face of the plateembedding the connections and retained by retaining members.

4. In a mold board, a metal plate, marginal retaining members, hookscarried by said members and engaging over the edges of the plate,connections between the members extending over he face of the plate,

and a coating of plastic material deposited on the face of the plateconcealing the connections and retained by the members.

5. In a composite mold board, a metal plate, marginal retaining membersdisposed in opposite relation along opposite edges of the plate, hookspivoted to the members in opposed relation and engaging each otherbetween the members and also engaging the edges of the plate, and acoating of plastic material deposited on the face of the plateconcealing the hooks and retained by the members.

6. In a device for retaining a plastic coating on a plow mold board, apair of opposed retaining members shaped to conform to the contour ofopposite edges of a mold board, devices connected to the members forengaging said edges of the mold board, and connections extending betweendevices, said members being adapted to retain a coating of plasticmaterial on the face of the mold board and to confine the plasticmaterial.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses. 7

JAMES S. FERRIS.

WVitnes'ses:

J. T. SPENCER- N. GAMMoN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. G.

